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Finding the Fourth Proportional to 119,779.50, 165,360.51 and 72,043.50

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Solution

The fourth proportional to 119,779.50, 165,360.51 and 72,043.50 is: 99,459.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,779.50 : 165,360.51 = 72,043.50 : x
  2. Step 2: Convert to fraction form
    119,779.50/165,360.51 = 72,043.50/x
  3. Step 3: Cross multiply
    119,779.50x = 165,360.51 × 72,043.50
  4. Step 4: Simplify right side
    119,779.50x = 11,913,149,902.19
  5. Step 5: Solve for x
    x = 11,913,149,902.19/119,779.50
  6. Step 6: Final answer
    x = 99,459.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.